Cylinder Head Installation Note

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

If the following condition is met, replace the cylinder head bolts.
- Length exceeds maximum specification
Fig 1: Checking Cylinder Head Bolt Length L
Courtesy of MAZDA MOTORS CORP.

Cylinder head bolt length L

145.2-145.8 mm {5.717-5.740 in}

Cylinder head bolt length L maximum

146.5 mm {5.767 in}

When a cylinder head bolt is reused, apply engine oil to any part of the following:
- Bolt seating surface
- Cylinder head seating surface
CAUTION:
- Completely remove oil, dirt, and sealant adhering to the cylinder head gasket contacting surfaces. Otherwise, a sealing malfunction may occur.
Completely remove any oil, dirt, and sealant adhering to the cylinder block.
CAUTION:
- Be aware of the following points, otherwise a sealing malfunction may occur due to hardening of the sealant.
  - Set cylinder head on cylinder block within 10 min after silicone sealant is applied
  - After setting cylinder head, tighten cylinder head bolts immediately
Apply silicone sealant (TB1217D or equivalent) to the areas shown in the figure.
SKYACTIV-G 2.0

Fig 2: Applying Silicone Sealant (TB1217D Or Equivalent) To Areas
Courtesy of MAZDA MOTORS CORP.

Silicone sealant application diameter

5-10 mm {0.2-0.3 in}

SKYACTIV-G 2.5

Fig 3: Checking Cylinder Head Gasket To Cylinder Block
Courtesy of MAZDA MOTORS CORP.

Silicone sealant application diameter

5-10 mm {0.2-0.3 in}
Install a new cylinder head gasket to the cylinder block.
Apply silicone sealant (TB1217D or equivalent) to the areas shown in the figure.
SKYACTIV-G 2.0

Fig 4: Applying Silicone Sealant (TB1217D Or Equivalent) To Areas
Courtesy of MAZDA MOTORS CORP.

Silicone sealant application diameter

5-10 mm {0.2-0.3 in}

SKYACTIV-G 2.5

Fig 5: Checking Cylinder Head On Cylinder Block
Courtesy of MAZDA MOTORS CORP.

Silicone sealant application diameter

5-10 mm {0.2-0.3 in}
Set the cylinder head on the cylinder block.
Tighten the cylinder head bolts in the order shown in the following 4 steps.

Fig 6: Cylinder Head Bolts Tightening Sequence
Courtesy of MAZDA MOTORS CORP.

Tightening torque

Step 1: 13-17 N.m {133-173 kgf.cm, 116-150 in.lbf}

Step 2: 43-47 N.m {4.4-4.7 kgf.m, 32-34 ft.lbf}

Step 3: 85-95°

Step 4: 85-95°
Install the chain for the SST which was set aside and secure the engine.
Remove the engine lifter or garage jack.
Remove the temporarily assembled oil pan.